146 lines
4.3 KiB
Plaintext
146 lines
4.3 KiB
Plaintext
/*******************************************************************************//**
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* \file libsangoma.c
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* \brief Wanpipe API Code Library for Sangoma AFT T1/E1/Analog/BRI/Serial hardware
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*
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* Author(s): Nenad Corbic <ncorbic@sangoma.com>
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* David Rokhvarg <davidr@sangoma.com>
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* Michael Jerris <mike@jerris.com>
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* Anthony Minessale II <anthmct@yahoo.com>
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*
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* Copyright: (c) 2005-2008 Nenad Corbic <ncorbic@sangoma.com>
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*
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* * Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the Sangoma Technologies nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Sangoma Technologies ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL Sangoma Technologies BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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*******************************************************************************
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*/
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#include "libsangoma-pvt.h"
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#include "libsangoma.h"
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#include "g711.h"
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#include "math.h"
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#ifdef WP_API_FEATURE_DRIVER_GAIN
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static __inline int sangoma_set_gain(sng_fd_t fd, wanpipe_api_t *tdm_api, int cmd, float gain_val)
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{
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unsigned char *gain;
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int x;
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float gain_lin = powf(10.0, gain_val / 20.0);
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int i;
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int coding=-1;
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{
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wanpipe_api_t tmp_tdm_api;
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memset(&tmp_tdm_api,0,sizeof(wanpipe_api_t));
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coding = sangoma_get_hw_coding(fd,&tmp_tdm_api);
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if (coding < 0) {
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return coding;
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}
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}
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WANPIPE_API_INIT_CHAN(tdm_api, 0);
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SANGOMA_INIT_TDM_API_CMD_RESULT(*tdm_api);
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tdm_api->wp_cmd.cmd = cmd;
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gain = tdm_api->wp_cmd.data;
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tdm_api->wp_cmd.data_len=256;
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switch (coding) {
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case WP_MULAW:
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for (i = 0; i < 256; i++) {
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if (gain_val) {
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x = (int) (((float) ulaw_to_linear(i)) * gain_lin);
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if (x > 32767) x = 32767;
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if (x < -32767) x = -32767;
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gain[i] = linear_to_ulaw(x);
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} else {
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gain[i] = i;
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}
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}
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break;
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case WP_ALAW:
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for (i = 0; i < 256; i++) {
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if (gain_val) {
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x = (int) (((float) alaw_to_linear(i)) * gain_lin);
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if (x > 32767) x = 32767;
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if (x < -32767) x = -32767;
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gain[i] = linear_to_alaw(x);
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} else {
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gain[i] = i;
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}
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}
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break;
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default:
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return -1;
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}
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#if 0
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{
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int i;
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printf("Data size = %i\n",sizeof(tdm_api->wp_cmd.data));
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for (i=0;i<256;i++) {
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printf("Set Gain Coding=%i: [%03i]=%03i\n", coding, i, gain[i]);
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}
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}
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#endif
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return sangoma_cmd_exec(fd, tdm_api);
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}
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int _LIBSNG_CALL sangoma_set_tx_gain(sng_fd_t fd, wanpipe_api_t *tdm_api, float gain_val)
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{
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return sangoma_set_gain(fd,tdm_api, WP_API_CMD_SET_TX_GAINS, gain_val);
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}
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int _LIBSNG_CALL sangoma_set_rx_gain(sng_fd_t fd, wanpipe_api_t *tdm_api, float gain_val)
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{
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return sangoma_set_gain(fd,tdm_api,WP_API_CMD_SET_RX_GAINS,gain_val);
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}
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int _LIBSNG_CALL sangoma_clear_tx_gain(sng_fd_t fd, wanpipe_api_t *tdm_api)
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{
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WANPIPE_API_INIT_CHAN(tdm_api, 0);
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SANGOMA_INIT_TDM_API_CMD_RESULT(*tdm_api);
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tdm_api->wp_cmd.cmd = WP_API_CMD_CLEAR_TX_GAINS;
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return sangoma_cmd_exec(fd, tdm_api);
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}
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int _LIBSNG_CALL sangoma_clear_rx_gain(sng_fd_t fd, wanpipe_api_t *tdm_api)
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{
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WANPIPE_API_INIT_CHAN(tdm_api, 0);
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SANGOMA_INIT_TDM_API_CMD_RESULT(*tdm_api);
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tdm_api->wp_cmd.cmd = WP_API_CMD_CLEAR_RX_GAINS;
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return sangoma_cmd_exec(fd, tdm_api);
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}
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#endif
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